2000MNRAS.318..715X


Query : 2000MNRAS.318..715X

2000MNRAS.318..715X - Mon. Not. R. Astron. Soc., 318, 715-723 (2000/November-1)

Properties of the double β model for intracluster gas.

XUE Y.-J. and WU X.-P.

Abstract (from CDS):

We present an extensive study of the double β model for the X-ray surface brightness profiles of clusters, and derive analytically the gas density and total masses of clusters under the hydrostatic equilibrium hypothesis. It is shown that the employment of the double β model instead of the conventional single β model can significantly improve the goodness-of-fit to the observed X-ray surface brightness profiles of clusters, which will in turn lead to a better determination of the gas and total mass distributions in clusters. In particular, the observationally fitted β parameter for the extended component in a double β model may become larger. This opens a new possibility of resolving the long-standing β discrepancy for clusters. Using an ensemble of 33 ROSAT PSPC observed clusters drawn from the Mohr, Mathiesen & Evrard sample, we find that the asymptotic value of βfit is 0.83±0.33 at large radii, consistent with both the average spectroscopic parameter βspec=0.78±0.37 and the result given by numerical simulations.

Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): galaxies: clusters: general - intergalactic medium - X-rays: galaxies

Simbad objects: 35

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Number of rows : 35
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 844 0
2 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 677 1
3 2MAXI J0254+416 ClG 02 54 32.2 +41 35 10           ~ 304 1
4 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 541 0
5 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 298 1
6 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2116 1
7 ACO 478 ClG 04 13 20.7 +10 28 35           ~ 482 0
8 ACO 3266 ClG 04 31 11.9 -61 24 23           ~ 388 0
9 ACO 496 ClG 04 33 30.3838 -13 14 21.584           ~ 671 2
10 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 186 1
11 ACO 754 ClG 09 08 50.1 -09 38 12           ~ 647 1
12 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 808 1
13 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1041 1
14 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1022 2
15 ACO 3532 ClG 12 57 19.2 -30 22 13           ~ 162 2
16 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 278 0
17 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4548 2
18 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1074 0
19 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 296 1
20 ACO 3571 ClG 13 47 28.9 -32 51 57           ~ 270 2
21 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1205 0
22 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 896 0
23 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 703 1
24 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 380 2
25 ACO 2142 ClG 15 58 20.00 +27 14 00.3           ~ 718 0
26 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1132 1
27 ACO 2244 ClG 17 02 34.01 +34 04 41.1           ~ 256 0
28 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 859 1
29 ACO 2319 ClG 19 20 45.3 +43 57 43           ~ 436 1
30 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2256 2
31 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 595 1
32 ACO 2390 ClG 21 53 34.6 +17 40 11           ~ 653 2
33 ACO 2579 ClG 23 21 08.4 -21 33 33           ~ 23 0
34 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 519 0
35 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 368 1

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2022.09.26-09:19:15

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